Sparta VS. Athens
They were training 7 year olds until they were 20, so they could join the actual army.
The men could never leave the army, for until they were 60 they had to train and fight in battles. Once the men reached 60 years of age, they were allowed to retire. But they still had to train for emergencies.
Zeus was the ruler of the land and the heavens, he was the ruler of all other god's and godesses. The gods were said to live on the top of Mt. Olympus, a mountain in northern Greece.